Smart Purchase - or Bad Mistake?

I know a guy selling his landscaping equipment. He has been the only owner and says he maintained everything and that they are in good condition. I'm thinking about buying:
1. 36" Great Dane. 300 Hours. 2 years old. $2500

2. 52" Great Dane. 3-3 1/2 years old. 575 Hours. $3500

Are these good prices? Would you buy neither, one, or both? Any advice would be helpful.

Great Dane has just been sold by JD. In a lot of areas, parts supply has been a real problem. It seems to me, that during the transition of ownership, parts could become even harder, if not impossible to get. Just something to think about.